Adjust the SDK/API version check for getInsetsController()

The function is introduced in API level 30, causing an error
on a 29 device

Amends: eda4049a01

Pick-to: 6.5 6.4 6.2
Change-Id: I5f4e2301d04a0a2e0e2f4037e4c371efd2fef352
Reviewed-by: Bartlomiej Moskal <bartlomiej.moskal@qt.io>
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

src/android/jar/src/org/qtproject/qt/android/QtActivityDelegate.java

@@ -982,7 +982,7 @@ public class QtActivityDelegate
     private void handleUiModeChange(int uiMode)
     {
         // QTBUG-108365
-        if (Build.VERSION.SDK_INT >= 29) {
+        if (Build.VERSION.SDK_INT >= 30) {
             // Since 29 version we are using Theme_DeviceDefault_DayNight
             Window window = m_activity.getWindow();
             WindowInsetsController controller = window.getInsetsController();